Fifth Avenue is three bays wide and, at the ground floor, contains a large opening surrounded by blocks of rusticated limestone. The facade along 52nd Street also has a rusticated limestone facade and contains seven vertical bays, with an arched entrance in the center bay. The 52nd Street entrance was the original main entrance to the house, which was known initially as 2 East 52nd Street. The ground-story openings are square-headed, except for an arched opening at the center, which was the carriage entrance. At the second and third stories on 52nd Street, the central three bays form a slightly projecting pavilion, with an ornate balustrade in front of the second-story windows. The center window on the second story of the pavilion has engaged columns, which support a curved pediment. The pavilion also contains four pilasters separating the windows on the second and third stories; the pilasters are fluted and contain Scamozzi capitals at their tops. The pilasters support a pediment at the fourth story. On either side of the central pavilion, there are two windows on each of the second and third stories on 52nd Street, as well as three similarly designed windows on each story on Fifth Avenue. The second-story windows have individual balustrades at the bottom and are flanked by engaged columns that support lintels with denticulation. The center window on Fifth Avenue has a clock above it. The third-story windows are topped by denticulated lintels supported by brackets. On the fourth story, there are six windows on 52nd Street (three on each side of the pavilion) and five on Fifth Avenue. These windows are simpler in design and contain lintels above them. The fifth-story attic has a frieze within which are small window openings. A cornice with modillions, as well as a balustrade, runs above the attic. During the December holiday season, the facade of the mansion is wrapped with a large red ribbon. Edward Holbrook House 4 East 52nd Street comprises the Edward Holbrook House, which is internally joined to the Morton F. Plant House. This house is five stories tall and has a neoclassical design. The limestone facade is divided into three bays. At the lowest two stories, there are plate glass windows and the center bay is wider than the other two bays. There is a projecting marquee and a clock above the center bay of the first story, while the outer bays